Because Ye Ziyun was formed from the three poisons of Ye Qingyun's thoughts, his very existence embodied the purest evil of the three poisons in all creation, something even Ye Qingyun could not subdue.
Even though Ye Ziyun willingly chose to undergo reincarnation, as the embodiment of the three poisons, the most terrifying and powerful aspect of his being was naturally transferred into the Naraka Realm.
In other words, among the six paths of reincarnation, the most dreadful aspect of Ye Ziyun resided within the Naraka Realm.
Chapter 1361